Planetary transmission, powertrain and wind turbine

Abstract

A planetary transmission includes a ring gear holder and a ring gear for accommodating at least one planetary gear. The ring gear holder can be connected to a housing component at its end face, and a plurality of recesses for accommodating fastening means are embodied at an end face of the ring gear holder. Accommodated in at least one of the recesses is a hollow element, in which a fastening screw is accommodated. The hollow element establishes a positive-fit engagement between the ring gear holder and the housing component.

What is claimed is: 
     
       1. A planetary transmission, comprising:
 a housing component; 
 a ring gear holder configured for connection to the housing component, with the ring gear holder and the housing component having abutting end faces formed with aligned recesses; 
 a ring gear received in the rear gear holder for interacting with at least one planetary gear; 
 a hollow element accommodated in at least one of the recesses to establish a positive-fit engagement between the ring gear holder and the housing component, said at least one of the recesses being embodied as a bore hole defined by a first bore hole diameter and a second bore hole diameter; 
 a fastening screw received in the hollow element; and 
 a torque support attached to the housing component, with the at least one of the recesses, with the hollow element accommodated therein and the fastening screw, being arranged in a region of the torque support. 
 
     
     
       2. The planetary transmission of  claim 1 , wherein the hollow element is embodied as a hollow pin or as a tensioning sleeve. 
     
     
       3. The planetary transmission of  claim 1 , wherein the ring gear is accommodated in the ring gear holder in a non-rotating manner or is embodied in one piece with the ring gear holder. 
     
     
       4. The planetary transmission of  claim 1 , wherein a stepped or a conical transition is embodied between a first region with the first bore hole diameter and a second region with the second bore hole diameter. 
     
     
       5. The planetary transmission of  claim 1 , wherein the end face of the ring gear holder has a radial width which corresponds to 1.5 to 5.0 times the first bore hole diameter or second bore hole diameter, or corresponds to 3.0 to 8.0 times a modulus of a toothing on the planetary gear and/or the ring gear. 
     
     
       6. The planetary transmission of  claim 1 , further comprising a coating arranged in the form of a washer, plate, membrane, film or as a microstructure between the end face of the ring gear holder and the housing component to increase a coefficient of friction. 
     
     
       7. The planetary transmission of  claim 1 , further comprising a coating embodied as a ring, as a ring segment, as a perforated tape or as a circular arc segment between the end face of the ring gear holder and the housing component to increase a coefficient of friction. 
     
     
       8. The planetary transmission of  claim 1 , wherein in an assembled state, Rötscher cones of fasteners in two adjacent ones of the recesses partially mutually overlap. 
     
     
       9. The planetary transmission of  claim 1 , wherein the hollow element and the fastening screw are embodied such that, in an assembled state, the hollow element is at least partially enclosed by a Rötscher cone of the fastening screw. 
     
     
       10. The planetary transmission of  claim 1 , wherein the hollow element and the fastening screw are embodied such that, in an assembled state, the hollow element is completely enclosed by a Rötscher cone of the fastening screw. 
     
     
       11. The planetary transmission of  claim 1 , wherein the hollow element is made of a metallic material. 
     
     
       12. A drive train for a wind turbine, said drive train comprising:
 a generator; 
 a planetary transmission connected in a torque-transferring manner to the generator and comprising a housing component, a ring gear holder configured for connection to the housing component, with the ring gear holder and the housing component having abutting end faces formed with aligned recesses, a ring gear received in the rear gear holder for interacting with at least one planetary gear, a hollow element accommodated in at least one of the recesses to establish a positive-fit engagement between the ring gear holder and the housing component, said at least one of the recesses being embodied as a bore hole defined by a first bore hole diameter and a second bore hole diameter, a fastening screw received in the hollow element, and a torque support attached to the housing component, with the at least one recess, with the hollow element accommodated therein and the fastening screw, being arranged in a region of the torque support; and 
 a rotor shaft connected in a torque-transferring manner to the planetary transmission. 
 
     
     
       13. A wind turbine, comprising:
 a drive train as set forth in  claim 11  and including a rotor shaft; and 
 a rotor connected to the rotor shaft of the drive train via a rotor bearing.